Administration Console Online Help

SNMP String Monitors: Servers

If this monitor's SNMP agent is running on the Administration Server,
use this page to select the servers that you want to monitor.

If this monitor's SNMP agent is running only on individual Managed
Servers, you do not need to select a server from this list. An SNMP agent
on a Managed Server monitors only its host Managed Server. It ignores this
list of servers.

If you use an SNMP agent on the Administration Server, when you
activate a monitor on a server, you deploy a JMX listener and filter to
the server. The listener will forward a notification to the SNMP agent on
the Administration Server only if an event matches the criteria in the
monitor.

For example, if you create a string monitor that observes the
State attribute of ServerA's ServerRuntime
MBean, and if you target this monitor to ServerB, the monitor on ServerB
will never generate a notification, because ServerB does not have access
to the state of ServerA.

This attribute is applicable only when the SNMP Agent is running
on the Admin Server of a WebLogic Domain. The EnabledServers
attribute allows the users to limit the scope of the monitored data
sources to the specific named Servers. The EnabledServers list is
ignored when the SNMAgentDeploymentMBean is targeted to a Managed
Server. In the case of a Managed Server the SNMP Agent only looks
at the data available in the WebLogic Server where the SNMP Agent
is deployed.

For traps based on MBean attributes the SNMP Agent refers to the
Domain Runtime MBean Server when it is running on the Admin Server
and the Runtime MBean Server when it is deployed to a Managed
Server.

In the case of SNMPJMXMonitorMBean and
SNMPAttributeChangeMBean the
MonitoredMBeanType and MonitoredMBeanName
attributes specify the type and name of a WebLogic Server MBean for
which the trap will be setup. MBeans that meet the Type and Name
criteria are qualified to set the trap on. The EnabledServers
attribute allows a user to specify additional criteria based on the
Location of an MBean when the SNMP Agent is targeted to the Admin
Server. MBeans whose Location matches one of the Servers in the
EnabledServers list are considered eligible for the trap to be
generated for a corresponding JMX notification. When the
EnabledServers attribute is not specified all MBeans whose Type and
Name match are considered as valid sources for the SNMP trap.

In the case of SNMPLogFilterMBean the
EnabledServers attribute allows a user to specify the Servers in
the Domain whose log messages will be monitored when the Agent is
running on the Admin Server. When EnabledServers is not specified
for an Agent running on the Admin Server log messages on all
Managed Servers in the domain are monitored for sending traps. This
attribute is not applicable when the SNMP Agent is targeted to a
Managed Server, in this case the traps are sent based on log
messages generated by the respective Managed Server where the Agent
is deployed.